GitLab is an app to run in Pipeline.

• Can be installed on many OS
• Application that runs job in a pipeline
• Can also be installed on cloud and on-prem
• Also run on Shell, Docker and K8S

Docker person register that agent with a token. It established a trust relationship between GitLab instance and a communication channel.

Seamless integration into the code repository

Using CI/CD without overhead of setting it up yourself

Pipeline configuration as part of your application code

Self-Hosted or SaaS managed

While Jenkins is only CI/CD tool and Self- Hosting is the only option

Types of Runner

1. Private Runner- self hosted agent, it can be installed on your own data center or cloud service
2. Shared runner - uses available to all groups and projects in a GitLab instance
3. Group Runner - available to all projects and subgroups in a group, it can be installed on Kubernetes for high availability and fault tolerance